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Get Latest 640-802 dumps Questions - Examsforsure

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  1. CISCO 640-802 Cisco Certified Network Associate (CCNA) https://www.examsforsure.com/cisco/640-802-dumps.html

  2. Topic break down Topic No. of Questions Topic 2: Configure, verify and troubleshoot a switch with VLANs and interswitch communications 3 Topic 3: Implement an IP addressing scheme and IP Services to meet network requirements in a medium-size Enterprise branch office network 3 Topic 4: Configure, verify, and troubleshoot basic router operation and routing on Cisco devices 3 Topic 7: Implement, verify, and troubleshoot NAT and ACLs in a medium-size Enterprise branch office network 1 2

  3. Topic 2, Configure, verify and troubleshoot a switch with VLANs and interswitch communications Question No : 1 - (Topic 2) Which protocol reduces administrative overhead in a switched network by allowing the configuration of a new VLAN to be distributed to all the switches in a domain? A. STP B. VTP C. GVRP D. SNMP E. DHCP Answer: B Question No : 2 - (Topic 2) Select the action that results from executing these commands. Switch(config-if)# switchport port-security Switch(config-if)# switchport port-security mac-address sticky A. A dynamically learned MAC address is saved in the startup-configuration file. B. A dynamically learned MAC address is saved in the running-configuration file. C. A dynamically learned MAC address is saved in the VLAN database. D. Statically configured MAC addresses are saved in the startup-configuration file if frames from that address are received. E. Statically configured MAC addresses are saved in the running-configuration file if frames from that address are received. Answer: B Explanation: In the interface configuration mode, the command switchport port-security mac-address sticky enables sticky learning. When entering this command, the interface converts all the dynamic secure MAC addresses to sticky secure MAC addresses. 3

  4. Question No : 3 - (Topic 2) Assuming the default switch configuration, which approach should you use to configure the extended VLAN range (1006 through 4094) on a Cisco Catalyst 3750 Series switch? A. Configure the switch to be in VTP client mode. B. Configure the switch to be in VTP domain mode. C. Configure the switch to be in VTP transparent mode. D. Configure the switch to be in VTPv2. Answer: C Topic 3, Implement an IP addressing scheme and IP Services to meet network requirements in a medium-size Enterprise branch office network Question No : 4 - (Topic 3) Which two of these statements are true of IPv6 address representation? (Choose two.) A. There are four types of IPv6 addresses: unicast, multicast, anycast, and broadcast. B. A single interface may be assigned multiple IPv6 addresses of any type. C. Every IPv6 interface contains at least one loopback address. D. The first 64 bits represent the dynamically created interface ID. E. Leading zeros in an IPv6 16 bit hexadecimal field are mandatory. Answer: B,C Explanation: Leading zeros in IPv6 are optional do that 05C7 equals 5C7 and 0000 equals 0 -> D is not corect. Question No : 5 - (Topic 3) The network administrator has asked you to check the status of the workstation's IP stack by pinging the loopback address. Which address would you ping to perform this task? A. 10.1.1.1 4

  5. B. 127.0.0.1 C. 192.168.0.1 D. 239.1.1.1 Answer: B Explanation: Explanation The IP address of 127.0.0.1 is the well-known loopback IP address on a computer. When pinging this address, you are testing if the TCP/IP stack is working or not. Question No : 6 - (Topic 3) Given a subnet mask of 255.255.255.224, which of the following addresses can be assigned to network hosts? (Choose three.) A. 15.234.118.63 B. 92.11.178.93 C. 134.178.18.56 D. 192.168.16.87 E. 201.45.116.159 F. 217.63.12.192 Answer: B,C,D Explanation: Explanation A subnet mask of 255.255.255.224 has an increment of 32 (the binary form of the last octet is 1110 0000) so we can’t use numbers which are the multiples of 32 because they are sub-network addresses. Besides, we can’t use broadcast addresses of these sub-networks (the broadcast address of the previous subnet is calculated by subtracting 1 from the network address). For example the network address of the 2nd subnet is x.x.x.32 then the broadcast address of the 1st subnet is 32 – 1 = 31 (means x.x.x.31). By this method we can calculate the unusable addresses, which are (notice that these are the 4th octets of the IP addresses only): + Network addresses: 0, 32, 64, 96, 128, 160, 192, 224.+ Broadcast addresses: 31, 63, 95, 127,159, 191, 223. Topic 4, Configure, verify, and troubleshoot basic router operation and routing on 5

  6. Cisco devices Question No : 7 - (Topic 4) Which routing protocols can be used within the enterprise network shown in the diagram? (Choose three.) A. RIP v1 B. RIPv2 C. IGRP D. OSPF E. BGP F. EIGRP Answer: B,D,F Explanation: Explanation RIPv1 & IGRP can not be used in this network because they do not support Variable Length Subnet Masking (VLSM). BGP is a complicated routing protocol between different network (usually very big) or different Autonomous System. For example BGP can be used between two Internet Service Providers (ISP). The above network is very small in an enterprise so BGP is not a suitable choice -> RIPv2 supports VLSM and can be used in networks which have less than 15 routers -> . OSPF and EIGRP can be always used in most of enterprise networks -. (But notice that EIGRP is a Cisco-proprietary routing protocol so it can be used in Cisco routers only) Question No : 8 - (Topic 4) 6

  7. A network administrator is troubleshooting the OSPF configuration of routers R1 and R2. The routers cannot establish an adjacency relationship on their common Ethernet link. The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2. Based on the information in the graphic, what is the cause of this problem? A. The OSPF area is not configured properly. B. The priority on R1 should be set higher. C. The cost on R1 should be set higher. D. The hello and dead timers are not configured properly. E. A backup designated router needs to be added to the network. F. The OSPF process ID numbers must match. Answer: D Question No : 9 - (Topic 4) A network admin wants to know every hop the packets take when he accesses cisco.com. Which command is the most appropriate to use? A. path cisco.com B. debug cisco.com C. trace cisco.com D. traceroute cisco.com Answer: D 7

  8. Topic 7, Implement, verify, and troubleshoot NAT and ACLs in a medium-size Enterprise branch office network Question No : 10 CORRECT TEXT - (Topic 7) Lab-NAT A network associate is configuring a router for the weaver company to provide internet access. The ISP has provided the company six public IP addresses of 198.18.184.105 198.18.184.110. The company has 14 hosts that need to access the internet simultaneously. The hosts in the company LAN have been assigned private space addresses in the range of 192.168.100.17 – 192.168.100.30. Answer: The company has 14 hosts that need to access the internet simultaneously but we just have 6 public IP addresses from 198.18.184.105 to 198.18.184.110/29. Therefore we have to use NAT overload (or PAT) 8

  9. Double click on the Weaver router to open it Router>enable Router#configure terminal First you should change the router's name to Weaver Router(config)#hostname Weaver Create a NAT pool of global addresses to be allocated with their netmask. Weaver(config)#ip nat pool mypool 198.18.184.105 198.18.184.110 netmask 255.255.255.248 Create a standard access control list that permits the addresses that are to be translated Weaver(config)#access-list 1 permit 192.168.100.16 0.0.0.15 Establish dynamic source translation, specifying the access list that was defined in the prior step Weaver(config)#ip nat inside source list 1 pool mypool overload This command translates all source addresses that pass access list 1, which means a source address from 192.168.100.17 to 192.168.100.30, into an address from the pool named mypool (the pool contains addresses from 198.18.184.105 to 198.18.184.110) Overload keyword allows to map multiple IP addresses to a single registered IP address (many-to-one) by using different ports The question said that appropriate interfaces have been configured for NAT inside and NAT outside statements. This is how to configure the NAT inside and NAT outside, just for your understanding: Weaver(config)#interface fa0/0 Weaver(config-if)#ip nat inside Weaver(config-if)#exit Weaver(config)#interface s0/0 Weaver(config-if)#ip nat outside Weaver(config-if)#end Finally, we should save all your work with the following command: Weaver#copy running-config startup-config Check your configuration by going to "Host for testing" and type: C :\>ping 192.0.2.114 The ping should work well and you will be replied from 192.0.2.114 Another way Click Knowledge Base for NAT SIM to learn the concepts before attempting or learning this SIM Question NAT SIM Configuration: The following configuration translates between inside hosts (Weaver LAN) addressed from 9

  10. 192.168.100.16 /28 network (192.168.100.17 – 192.168.100.30) to the globally unique pool of address provided by ISP 198.18.184.105 – 198.18.184.110/29. Weaver>enable Weaver#configure terminal Before starting the NAT configuration verify that router hostname currently configured is weaver. If not change hostname to Weaver using the command Router(config)#hostname Weaver Step1: Create an access-list to match all the Weaver LAN address that need to be the candidates for NAT translations Weaver(config)#access-list 10 permit 192.168.100.16 0.0.0.15 Step2: Create a NAT Pool with pool name isp_adr and specify the pool address range provided by ISP with their netmask. Weaver(config)#ip nat pool TestKiss 198.18.184.105 198.18.184.110 netmask 255.255.255.248 Step3: Packets that match access-list 10 will be translated to an address from the pool called "TestKiss". Overload keyword specify to use Port based NATing to support all the Weaver LAN address range. Weaver(config)#ip nat inside source list 10 pool TestKiss overload SIM Question already provides that appropriate interfaces have been configured for NAT Inside and NAT Outside statements. For your information configuration would have been like this Weaver(config)#interface fastethernet 0/0 Weaver(config-if)#ip nat inside Weaver(config)#interface serial 0/0 Weaver(config-if)#ip nat outside Weaver#copy run start Functionality Test: Our requirements are to allow the hosts (Weaver LAN) the ability to communicate with the Internet. For this test, we ping the Internet device (ISP router S0/1) from Host for testing. Step1: Go to host for testing: Answer: \>ping 192.0.2.114 PING should be success to 192.0.2.114 since SIM question provides that static route is already configured on router. Step2: On console of router (Weaver) : Issue show ip nat translation command to verify the NAT translations. Sample output: 10

  11. Considering host for testing IP address is 192.168.100.17 weaver# show ip nat translation Pro Inside global Inside local Outside local Outside global icmp 198.18.184.105:434 192.168.100.17:434 192.0.2.113:434 192.0.2.114:434 icmp 198.18.184.105:435 192.168.100.17:435 192.0.2.113:435 192.0.2.114:435 icmp 198.18.184.105:436 192.168.100.17:436 192.0.2.113:436 192.0.2.114:436 icmp 198.18.184.105:437 192.168.100.17:437 192.0.2.113:437 192.0.2.114:437 icmp 198.18.184.105:438 192.168.100.17:438 192.0.2.113:438 192.0.2.114:438 https://www.examsforsure.com/cisco/640-802-dumps.html 11